<!DOCTYPE html>
<html lang="zh">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>ID选择器</title>
  <style type="text/css">
    /* 元素选择器 */
    html {
      background-color: #F0F0F0;
    }
    header {
      padding: 40px;
      background-color: white;
    }
    footer {
      margin-top: 20px;
      font-size: 0.6em;
      color: grey;
    }

    /* 类选择器 */
    .main {
      margin: 10px;
    }
    .newsSection {
      margin-top: 20px;
      padding: 20px;
      background-color: white;
    }
    /* ********** BEIGN ********** */
    #chosen {
      color:red;
    }
    #news {
      color:blue;
    }    
    #finance {
      color:olive;
    }
    #think {
      color:green;
    }
    #life {
      color:orange;
      
    }
    
    

    /*选择menu元素下的li子元素*/
    #menu li {
      float: left;
      width: 70px;
      font-size: 1.2em;
      font-weight: lighter;
    }
    /*选择menu元素下的li子元素和li下得a子元素*/
    #menu li, li a {
      list-style: none;
      text-decoration: none;
    }
    /* ********** END ********** */
  </style>
</head>
<body>
<div class="main">
  <!-- ********** BEGIN ********** -->
  <header id="menu">
  <!-- ********** END ********** -->
    <li><a href="#chosen">精选</a></li>
    <li><a href="#news">时事</a></li>
    <li><a href="#finance">财政</a></li>
    <li><a href="#think">思想</a></li>
    <li><a href="#life">生活</a></li>
  </header>

  <div class="newsSection">
    <section>
      <h2 id="chosen">精选</h2>
      <li>精选新闻1</li>
      <li>精选新闻2</li>
      <li>精选新闻3</li>
    </section>
    <section>
      <h2 id="news">时事</h2>
      <li>时事新闻1</li>
      <li>时事新闻2</li>
      <li>时事新闻3</li>
    </section>
    <section>
      <h2 id="finance">财政</h2>
      <li>财政新闻1</li>
      <li>财政新闻2</li>
      <li>财政新闻3</li>
    </section>
    <section>
      <h2 id="think">思想</h2>
      <li>思想新闻1</li>
      <li>思想新闻2</li>
      <li>思想新闻3</li>
    </section>
    <section>
      <h2 id="life">生活</h2>
      <li>生活新闻1</li>
      <li>生活新闻2</li>
      <li>生活新闻3</li>
    </section>
  </div>
  <footer>Copyright (c) News Copyright Holder All Rights Reserved.</footer>
</div>

</body>
</html>
